content: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
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  // modification, are permitted provided that the following conditions are
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  //
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  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
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  // distribution.
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  // contributors may be used to endorse or promote products derived from
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  //
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  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf;
  
  import com.google.protobuf.Descriptors.EnumDescriptor;
  import com.google.protobuf.Descriptors.FieldDescriptor;
  import com.google.protobuf.Descriptors.OneofDescriptor;
  import protobuf_unittest.UnittestProto.TestAllExtensions;
  import protobuf_unittest.UnittestProto.TestAllTypes;
  import protobuf_unittest.UnittestProto.TestEmptyMessage;
  import protobuf_unittest.UnittestProto.TestPackedTypes;
  import java.util.Arrays;
  import junit.framework.TestCase;
  
  /**
   * Unit test for {@link DynamicMessage}.  See also {@link MessageTest}, which
   * tests some {@link DynamicMessage} functionality.
   *
   * @author kenton@google.com Kenton Varda
   */
  public class DynamicMessageTest extends TestCase {
    TestUtil.ReflectionTester reflectionTester =
      new TestUtil.ReflectionTester(TestAllTypes.getDescriptor(), null);
  
    TestUtil.ReflectionTester extensionsReflectionTester =
      new TestUtil.ReflectionTester(TestAllExtensions.getDescriptor(),
                                    TestUtil.getExtensionRegistry());
    TestUtil.ReflectionTester packedReflectionTester =
      new TestUtil.ReflectionTester(TestPackedTypes.getDescriptor(), null);
  
    public void testDynamicMessageAccessors() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.setAllFieldsViaReflection(builder);
      Message message = builder.build();
      reflectionTester.assertAllFieldsSetViaReflection(message);
    }
  
    public void testSettersAfterBuild() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      Message firstMessage = builder.build();
      // double build()
      builder.build();
      // clear() after build()
      builder.clear();
      // setters after build()
      reflectionTester.setAllFieldsViaReflection(builder);
      Message message = builder.build();
      reflectionTester.assertAllFieldsSetViaReflection(message);
      // repeated setters after build()
      reflectionTester.modifyRepeatedFieldsViaReflection(builder);
      message = builder.build();
      reflectionTester.assertRepeatedFieldsModifiedViaReflection(message);
      // firstMessage shouldn't have been modified.
      reflectionTester.assertClearViaReflection(firstMessage);
    }
  
    public void testUnknownFields() throws Exception {
      Message.Builder builder =
          DynamicMessage.newBuilder(TestEmptyMessage.getDescriptor());
      builder.setUnknownFields(UnknownFieldSet.newBuilder()
          .addField(1, UnknownFieldSet.Field.newBuilder().addVarint(1).build())
          .addField(2, UnknownFieldSet.Field.newBuilder().addFixed32(1).build())
          .build());
      Message message = builder.build();
      assertEquals(2, message.getUnknownFields().asMap().size());
      // clone() with unknown fields
      Message.Builder newBuilder = builder.clone();
      assertEquals(2, newBuilder.getUnknownFields().asMap().size());
      // clear() with unknown fields
      newBuilder.clear();
      assertTrue(newBuilder.getUnknownFields().asMap().isEmpty());
      // serialize/parse with unknown fields
      newBuilder.mergeFrom(message.toByteString());
      assertEquals(2, newBuilder.getUnknownFields().asMap().size());
    }
  
    public void testDynamicMessageSettersRejectNull() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.assertReflectionSettersRejectNull(builder);
    }
  
    public void testDynamicMessageExtensionAccessors() throws Exception {
      // We don't need to extensively test DynamicMessage's handling of
      // extensions because, frankly, it doesn't do anything special with them.
      // It treats them just like any other fields.
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllExtensions.getDescriptor());
      extensionsReflectionTester.setAllFieldsViaReflection(builder);
      Message message = builder.build();
      extensionsReflectionTester.assertAllFieldsSetViaReflection(message);
    }
  
    public void testDynamicMessageExtensionSettersRejectNull() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllExtensions.getDescriptor());
      extensionsReflectionTester.assertReflectionSettersRejectNull(builder);
    }
  
    public void testDynamicMessageRepeatedSetters() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.setAllFieldsViaReflection(builder);
      reflectionTester.modifyRepeatedFieldsViaReflection(builder);
      Message message = builder.build();
      reflectionTester.assertRepeatedFieldsModifiedViaReflection(message);
    }
  
    public void testDynamicMessageRepeatedSettersRejectNull() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.assertReflectionRepeatedSettersRejectNull(builder);
    }
  
    public void testDynamicMessageDefaults() throws Exception {
      reflectionTester.assertClearViaReflection(
        DynamicMessage.getDefaultInstance(TestAllTypes.getDescriptor()));
      reflectionTester.assertClearViaReflection(
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor()).build());
    }
  
    public void testDynamicMessageSerializedSize() throws Exception {
      TestAllTypes message = TestUtil.getAllSet();
  
      Message.Builder dynamicBuilder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.setAllFieldsViaReflection(dynamicBuilder);
      Message dynamicMessage = dynamicBuilder.build();
  
      assertEquals(message.getSerializedSize(),
                   dynamicMessage.getSerializedSize());
    }
  
    public void testDynamicMessageSerialization() throws Exception {
      Message.Builder builder =
        DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.setAllFieldsViaReflection(builder);
      Message message = builder.build();
  
      ByteString rawBytes = message.toByteString();
      TestAllTypes message2 = TestAllTypes.parseFrom(rawBytes);
  
      TestUtil.assertAllFieldsSet(message2);
  
      // In fact, the serialized forms should be exactly the same, byte-for-byte.
      assertEquals(TestUtil.getAllSet().toByteString(), rawBytes);
    }
  
    public void testDynamicMessageParsing() throws Exception {
      TestAllTypes.Builder builder = TestAllTypes.newBuilder();
      TestUtil.setAllFields(builder);
      TestAllTypes message = builder.build();
  
      ByteString rawBytes = message.toByteString();
  
      Message message2 =
        DynamicMessage.parseFrom(TestAllTypes.getDescriptor(), rawBytes);
      reflectionTester.assertAllFieldsSetViaReflection(message2);
  
      // Test Parser interface.
      Message message3 = message2.getParserForType().parseFrom(rawBytes);
      reflectionTester.assertAllFieldsSetViaReflection(message3);
    }
  
    public void testDynamicMessageExtensionParsing() throws Exception {
      ByteString rawBytes = TestUtil.getAllExtensionsSet().toByteString();
      Message message = DynamicMessage.parseFrom(
          TestAllExtensions.getDescriptor(), rawBytes,
          TestUtil.getExtensionRegistry());
      extensionsReflectionTester.assertAllFieldsSetViaReflection(message);
  
      // Test Parser interface.
      Message message2 = message.getParserForType().parseFrom(
          rawBytes, TestUtil.getExtensionRegistry());
      extensionsReflectionTester.assertAllFieldsSetViaReflection(message2);
    }
  
    public void testDynamicMessagePackedSerialization() throws Exception {
      Message.Builder builder =
          DynamicMessage.newBuilder(TestPackedTypes.getDescriptor());
      packedReflectionTester.setPackedFieldsViaReflection(builder);
      Message message = builder.build();
  
      ByteString rawBytes = message.toByteString();
      TestPackedTypes message2 = TestPackedTypes.parseFrom(rawBytes);
  
      TestUtil.assertPackedFieldsSet(message2);
  
      // In fact, the serialized forms should be exactly the same, byte-for-byte.
      assertEquals(TestUtil.getPackedSet().toByteString(), rawBytes);
    }
  
    public void testDynamicMessagePackedParsing() throws Exception {
      TestPackedTypes.Builder builder = TestPackedTypes.newBuilder();
      TestUtil.setPackedFields(builder);
      TestPackedTypes message = builder.build();
  
      ByteString rawBytes = message.toByteString();
  
      Message message2 =
        DynamicMessage.parseFrom(TestPackedTypes.getDescriptor(), rawBytes);
      packedReflectionTester.assertPackedFieldsSetViaReflection(message2);
  
      // Test Parser interface.
      Message message3 = message2.getParserForType().parseFrom(rawBytes);
      packedReflectionTester.assertPackedFieldsSetViaReflection(message3);
    }
  
    public void testDynamicMessageCopy() throws Exception {
      TestAllTypes.Builder builder = TestAllTypes.newBuilder();
      TestUtil.setAllFields(builder);
      TestAllTypes message = builder.build();
  
      DynamicMessage copy = DynamicMessage.newBuilder(message).build();
      reflectionTester.assertAllFieldsSetViaReflection(copy);
  
      // Test oneof behavior
      FieldDescriptor bytesField =
          TestAllTypes.getDescriptor().findFieldByName("oneof_bytes");
      FieldDescriptor uint32Field =
          TestAllTypes.getDescriptor().findFieldByName("oneof_uint32");
      assertTrue(copy.hasField(bytesField));
      assertFalse(copy.hasField(uint32Field));
      DynamicMessage copy2 =
          DynamicMessage.newBuilder(message).setField(uint32Field, 123).build();
      assertFalse(copy2.hasField(bytesField));
      assertTrue(copy2.hasField(uint32Field));
      assertEquals(123, copy2.getField(uint32Field));
    }
  
    public void testToBuilder() throws Exception {
      DynamicMessage.Builder builder =
          DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      reflectionTester.setAllFieldsViaReflection(builder);
      int unknownFieldNum = 9;
      long unknownFieldVal = 90;
      builder.setUnknownFields(UnknownFieldSet.newBuilder()
          .addField(unknownFieldNum,
              UnknownFieldSet.Field.newBuilder()
                  .addVarint(unknownFieldVal).build())
          .build());
      DynamicMessage message = builder.build();
  
      DynamicMessage derived = message.toBuilder().build();
      reflectionTester.assertAllFieldsSetViaReflection(derived);
      assertEquals(Arrays.asList(unknownFieldVal),
          derived.getUnknownFields().getField(unknownFieldNum).getVarintList());
    }
  
    public void testDynamicOneofMessage() throws Exception {
      DynamicMessage.Builder builder =
          DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      OneofDescriptor oneof = TestAllTypes.getDescriptor().getOneofs().get(0);
      assertFalse(builder.hasOneof(oneof));
      assertSame(null, builder.getOneofFieldDescriptor(oneof));
  
      reflectionTester.setAllFieldsViaReflection(builder);
      assertTrue(builder.hasOneof(oneof));
      FieldDescriptor field = oneof.getField(3);
      assertSame(field, builder.getOneofFieldDescriptor(oneof));
  
      DynamicMessage message = builder.buildPartial();
      assertTrue(message.hasOneof(oneof));
  
      DynamicMessage.Builder mergedBuilder =
          DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      FieldDescriptor mergedField = oneof.getField(0);
      mergedBuilder.setField(mergedField, 123);
      assertTrue(mergedBuilder.hasField(mergedField));
      mergedBuilder.mergeFrom(message);
      assertTrue(mergedBuilder.hasField(field));
      assertFalse(mergedBuilder.hasField(mergedField));
  
      builder.clearOneof(oneof);
      assertSame(null, builder.getOneofFieldDescriptor(oneof));
      message = builder.build();
      assertSame(null, message.getOneofFieldDescriptor(oneof));
    }
  
    // Regression test for a bug that makes setField() not work for repeated
    // enum fields.
    public void testSettersForRepeatedEnumField() throws Exception {
      DynamicMessage.Builder builder =
          DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
      FieldDescriptor repeatedEnumField =
          TestAllTypes.getDescriptor().findFieldByName(
              "repeated_nested_enum");
      EnumDescriptor enumDescriptor = TestAllTypes.NestedEnum.getDescriptor();
      builder.setField(repeatedEnumField, enumDescriptor.getValues());
      DynamicMessage message = builder.build();
      assertEquals(
          enumDescriptor.getValues(), message.getField(repeatedEnumField));
    }
  }
  